Help javaweb eclipse Message instantiating Servlet class [. Com. Atguigu. Login. Servlet LoginServle-CodePudding

 
Package com. Atguigu. Login. Servlet; 

import java.io.IOException; 

The import javax.mail. Servlet. ServletException; 
The import javax.mail. Servlet. HTTP. HttpServlet; 
The import javax.mail. Servlet. HTTP. It; 
The import javax.mail. Servlet. HTTP. HttpServletResponse; 

/* * 
* handle the login request to the Servlet 
* 
* the Servlet is set by the sun's standard, Tomcat (web application server and Servlet container) to achieve the standard. 
* 
* the HttpServlet; 
*/
Public class LoginServlet extends the HttpServlet {

/* * 
* the commonly used methods: doGet doPost service 
* doGet: dealing with the client the way of the get request 
* 
* the doPost: deal with the request of the client's post way 
* 
* service: according to the specific request to call the corresponding doGet, doPost method 
*/

@ Override 
Protected void doGet (it the req, HttpServletResponse resp) throws ServletException, IOException {
The doPost (the req, resp); 
} 

@ Override 
Protected void doPost (it the req, HttpServletResponse resp) throws ServletException, IOException {
The realization of the function of//login. 
System. Out.println (" login request came over... "); 
} 
}

 
<? The XML version="1.0" encoding="utf-8"?> 



The client request matching process: 
With & lt; The servlet - mapping> The & lt; Url - pattern> Match, the matching to later, and then find & lt; The servlet - mapping> 
The & lt; The servlet - name> Value, take the value to & lt; Servlet> Nodes in the matching of the same & lt; The servlet - name> To find the 
 
Tomcat created by means of reflection LoginServlet instance, according to the request of the specific way to call the corresponding doGet or doPost method. 
--> 
 
 LoginServlet 
 Com. Atguigu. Login. Servlet. LoginServlet 
 

 
 LoginServlet 
/login